Create a bar char preference widget

- Per Q design, we will show a bar chart in Settings > Privacy page.
  Permission team also needs this bar chart in their page.
- Create a new library named SettingsLibBarChartPreference

Test: visual, robotest
Change-Id: Iff5a1233357a6aa6a667c0059f542a1b444b59a2
Fixes: 117623686